Probably a fire. Because if I were at the disco and there were a fire I would most likely panic(!), though they say not to. Panicking at the disco usually leads to people getting trampled, so be careful.

Sally (breathless): Panic! at the Disco.
John (Aghast): Yeah, I saw you trample that old lady on the news.

An indie-rock group from the US that debuted in 2005 with their album A Fever You Can't Sweat Out. They often use rather long song titles (Lying is the most fun a girl can have without taking her clothes; The Only difference betwwen martyrdom and suicide is press coverage; etc).

An awesome 'scene' band that blends together (creatively, I might add) rock, techno, disco, and pop to make up catchy songs about life. Their random lyrics seem to pull together in every song. They use very big words in their dance-worthy songs.

Anna:"Dude, I can't wait to hang at the Panic! at the disco concert"
Stephanie:"I know, it's gonna be awesome!"